2 years ago

What are the roots of the equation 2x^2+7x-3?

Mathematics

1 answer:

diamong [38]2 years ago

6 0

Using Quadratic formula,
x = 0.386, -3.886

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Solve the equation c/7=6 1/7

Softa [21]

c/7 = 6 1/7 ⇒ c = 43 ⇒ 43/7 = 6 1/7

Convert mixed fraction into a simple fraction

6 1/7 ⇒ (6 * 7 + 1)/7 = 43/7

c/7 = 43/7

proportionality:

a/b = c/d where ad = bc

a = c
b = 7
c = 43
d = 7

ad = bc ⇒ c7 = 7*43 ⇒ c7 = 301 ⇒ 7c/7 = 301/7 ⇒ c = 43

5 0

3 years ago

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Pleas help !!! Choices X= -1 Y = -1 X = 1 Y= 1

____ [38]

Answer:

x=-1

Step-by-step explanation:

The axis of symmetry is along the vertex

The vertex is at (-1,-2)

The x coordinate is -1

x=-1

6 0

2 years ago

Find the slope of the line #3 and 4 please:))

Leokris [45]

Answer:

#3 - y=4

#4 - x=-1

Step-by-step explanation:

With #3 you are only puting the y-value.

With #4 you are only putting the x-value.

5 0

3 years ago

5. Find cos theta if sin theta= -12/13 and tan theta > 0. (6 points)

ziro4ka [17]

$\text{Given that,}\\\\\sin \theta = -\dfrac{12}{13}\\\\\implies \sin^2 \theta = \dfrac{144}{169}\\\\\implies 1- \cos^2 \theta = \dfrac{144}{169}\\\\\implies \cos^2 \theta = 1- \dfrac{144}{169}\\\\\implies \cos^2 \theta = \dfrac{25}{169}\\\\\implies \cos \theta = \pm \sqrt{\dfrac{25}{169}} = \pm \dfrac 5{13}\\\\\\\text{Since,}~ \tan \theta >0,\\\\\cos \theta =- \dfrac{5}{13}$

8 0

1 year ago

Tia owns a fruit shop and is selling a fresh lot of apples and oranges. She wants the ratio of apples to oranges sold to be 4 to

Fantom [35]

Answer:

36 apples and 18 oranges

Step-by-step explanation:

4x+2x=54

6x=54

x=54/6

x=9

Apples=4x=36

Oranges=2x=18

6 0

2 years ago